Cutter-head.



F. L. LANE & F. B. WEAVER.

CUTTER HEAD.

APPLICATION FILED AUG.2. 1917.

Patented Apr. 1,1919.

2 SHEETS-SHEET1 F. L. LANE & F. R. WEAVER" CUTTER HEAD.

APPLICATION FILED AUG-2.1917

1,298,73'7.- Patented 11,1919.

2 SHEET EET 2- Famtiiivl. Zane STATES PATENT OFFICE.

FRANKLIN L. LANE AND FRANK R. WEAVER, OF BELOIT', WISCONSIN, ASSIGNORSTO 1?..13. YATES MACHINE COMPANY, OF BELOI'I, WISCONSIN, A CORPORATIONOF WIS- CONSIN.

To all whom it may concern:

Be it known. that we, FRANKLIN L. LANE and FRANK R. WEAVER, citizens ofthe United States, residing at Beloit, in the county' of'Rock and Stateof Wisconsin, have invented certain new and useful Improvements inCutter-Heads, of which the following is a specification.

The invention relates to wood working machinery of the type disclosed inPatent 1,183,015, granted on May 16, 1916, to us for an improvement incutter heads, and has for itsfobject the provision of a peculiarlyeflicient mounting of the tools in a cutter head.

In order that the invention may be readily understood by those skilledin the art, a preferred embodiment of the same is set forth in theaccompanying-drawings and in the description based thereon. As, however,the invention is susceptible of embodiment in other and variedconstructional forms depending upon the material and the nature of thework to be performed, the drawing and description are to be taken in anillustrative and not in an unnecessarily limiting sense. In thedrawings- Figure 1 is a face view of the cutter head;

Fig.2 is an'edge view of the same;

Fig. 3 is a section on the line 33 of Fig. 1'; r

Fig. 4 is a section on the line 44 of Fig. 1;

Fig. 5 is asection on the line 55 of 2; and v Fig. 6 is a'fragmentaryview in edge elevation of theparts'sho'wn in Fig. 5.

In "the embodiment illustrated the cutter head, indicated at 11, has aconvex or conically'beveled front face, the inclination to each other ofthose portions of the face on opposite sides of the center being slightand of such extent that when mounted with its shaft at a slightinclination to the horizontal, the lower portion of the operative faceof the cutter head will occupy a vertical position, or in a planeparallel to the plane of travel of the stock through the machine at theline of'cont'actwith the stock, while the upper portion of the face willlie in a plane at an angle'to the vertical and at'an angle to the planeof the travelof the stock.

IVithin the cutter head are mounted a plurality' of knives 12 extendingradially of the operative face with their cuttingedges conforming to'thebevel of theconed face of the Specification of Letters Patent.

CUTTER-HEAD.

Application filed August 2, 1917. Serial No. 184,137.

a head and substantially flush with said front face. These knives aremounted within slots 13 of the cutter head in conjunction with gibs 14which are wedge shape and disposed with their thinner ends outwardly asmost clearly shown in Fig. 4. The gib 14 has tapped into it a threadedscrew 15 encircled by a compression spring 16. The head 15 of the screwbears upon the outer or rear end ofthe spring 16 while the inner end ofthe spring seats-upon the bottom of a bore 17 within which the shankofthe screw and the spring 16 are accommodated. Alongside thewedge-shape slot '13 within which the lmife and gib are mounted is acompanionslot 18 within which is disposed a wedge block 19 arranged withits smaller end towardthe working face of the cutter head'and having itsface bored as indicated at 20 to serve as a-bearing for the screw 21threaded in the cutter head and having a squared head 21 projecting fromthe rear of the cutter head for purposes of adjustment; the engagementof the end of the screw '21 with the bore or recess 20 also serving toprevent lateral displacement of the block 19 relative to the screw 21.

It will be observed'that coacting faces of the gib 14 and the'wedgeblock 19 lie in a plane including th axis of the cutter head whereas theextreme faces of said members lie in converging planes intersecting andinclined to the axis of the cutter heads. The slots 13" and 18 are opento the edge of the cutter head as indicated in Fig. 2.

' In assembling the knives, the gibs and the wedge blocks, they aredropped into the opening or slot from the periphery of the cutter head,the screws 15 are then threaded into the gibs 14 whereby the said gibsare resiliently held with their bases in contact with the bottom of theslot, the bore 17% connecting the bore 17 with the slot, being slightlylarger than the screw 15 so as to permit of a slight lateral movement ofthe gib 14 toward and fromknives 12. The knives 12 having been properlypositioned within the slot 13 to efi'ect their cutting function, thescrew 21 is then adjusted by means of its head 21v so as to force thewedge block '19 outwardly and thereby crowd the, gib 14 firmly againstthe knife 12, lockingthe same securely in position. 1

About the peripheral margin of the cutter face, intermediate the radialknives 12, are

disposed a number of shorter knives 22 having cutting edges 23. Theseknives are mounted in the following. manner: In the edge of the cutterhead are the requisite number of radial bores 24 and alongside thereofand cutting the same are a number-of edge notches or slots extendingparallel to the cutter head axis; These slots 25have a bottom wall 26extending at right angles to the axis of the bores 24 and side wall 27extending parallel to said axis. The third wall of the slot is made upof two inclined portions 28 and 29 as clearly shown in Fig. 1, these twowalls 28 and 29 being arranged at a gentle inclination to the axis ofthe bore 24. The knife 22 having been dropped int the slot 25 which isalso open to the working face of the cutter head, a gib 30 is nextinserted froin the'rear or face of the head,

this gib being pentagonal in cross section as clearly shown in Fig. 5and having its several faces parallel to the several walls of the slot25. Previous to the insertion of the gib 30, however, the wedge block 31is dropped from the edge of the head into the radial bore 24. This wedgeblock, as shown in Fig. 5, has one of its sides cut away to form aninclined surface which is parallel to the wall 28 of the slot 25, thisinclined wall 31 being consequently parallel to one of the inclinedfaces of the gib 30 and adapted for cooperation therewith. Within thewedge block 31'is threaded a screw 32, the lower end of which has abearing seat in the reduced bottom of the bore 24 at 33, said screwbeing provided with a squared head 32 for its adjustment.

The knife 22 and the gib 30 having been dropped into place as previouslystated, with the inclined face of the gib bearing upon the inclined face31 of the wedge block, and the knife 22 having been correctly positionedto effect its cutting function, the screw 32 is turned by means of itshead 32 and the wedge block 31 is thereby forced radially of the cutterhead, acting to crowd the gib 30 against the knife 22 and thereby holdthe latter firmly in position.

It will be observed that by the provision made, the cutting tools orknives 12 and 22 are readily assembled and rigidly held in operativeposition. It will be readily understood that, in practice, the partshaving been once assembled, the lmives may be readjusted as to positionand may also be replaced and renewed without removing the wedge blockand gib, merely loosening upon the screws 21 and 32 respectively wherebythe knives will be relieved of the pressure of their gibs and may bereadjusted or replaced.

We claim:

1. A tool mounting comprising a cutter head having formed in its face a.slot with rearwardly diverging walls, a knife disposed in said slotagainst one of the walls thereof, a pair of inwardly thickened wedgeblocks disposed in the slot alongsidethe knife, one block bearingagainst/the knife and the second against the opposite wall of the slot,1 and a screw threaded in the cutter head and bearing upon the base ofthe second wedge block from the rear, whereby the wedge block may beforced forwardly to exert lateral wedging action through the 'wedgeblock from the rear, whereby the wedge block may be forced forwardly toexert lateral wedging action upon the knife through the gib, and meansto counteract any tendency of the gib to move forwardly with the wedgeblock.

3. A tool mounting comprising a cutter head having formed in its face aslot with rearwardly diverging walls, a knife disposed in said slotagainst one of the walls thereof, a gib lying in the slot alongside theknife, means for exerting tension rearwardly on the gib, an inwardlythickened wedge block disposed in the slot alongside the gib and knife,and a screw threaded in the cutter head and bearing upon the base of thewedge block from the rear, whereby the block may be forced forwardly toexert lateral wedging action upon the knife through the gib.

4. A tool mounting comprising a cutter head having formed in its face aslot with rearwardly diverging walls, a knife disposed in said slotagainst one of the walls thereof, a rearwardly thickened wedgeshaped giblying in the slot alongside the knife, a screw threaded in the base ofthe gib from the rear, a compression spring encircling the screw wherebyto provide means for exerting adjustable tension rearwardly on the gib,an inwardly thickened wedge block disposed in the slot alongside the giband knife, and a screw threaded in the cutter head and bearing upon thebase of the wedge block from the rear, whereby the block may be forcedforwardly to exert lateral wedging action upon the knife-through thegib.

5. A tool mounting comprising a cutter head having formed 1n its face aplurality of slots with rearwardly diverging walls,

of the walls thereof, rearwardly thickened wedge-shaped gibs lying inthe slots alongside the knives, screws threaded in the base of the gibsfrom the rear, compression springs encircling the screws whereby toprovide means for exerting adjustable tension rearwardly on the gibs,inwardly thickened wedge blocks disposed in the slots alongside the gibsand knives, and screws threaded in the cutter head and bearing uponbases of the wedge blocks from the rear, whereby the blocks may beforced forwardly to eXert lateral wedging action upon the knives throughthe gibs.

In testimony whereof we hai e hereunto 15 signed our names in thepresence of two subscribing witnesses.

FRANKLIN L. LANE. FRANK R. WEAVER. Witnesses:

F. A. HORSTMANN, PH. A. GosTMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. 0.

